<!DOCTYPE html>
<html>
<head>
    <title>GH-591</title>
</head>
<body>
<script>
    window.combinationPerformed = false;

    document.addEventListener('keydown', function (e) {
        if (e.shiftKey && e.ctrlKey && String.fromCharCode(e.keyCode).toLowerCase() === 'g')
            window.combinationPerformed = true;
    }, true);
</script>
</body>
</html>